what's a varistor ?

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gammelnalle
Junior tube assistant
Posts: 29
(3/31/04 10:16 am)
 what's a varistor ?
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 In some Magnatone guitar amps they use a Varistor to get real VIBRATO (not tremlo) When I look at the schematic in Aspen Pittman 4.1 Tube Amp Book page 559 I realize that its is some kind of phaseshift. But to my knowlage a varistor is a voltage depending devise... but I cant figure out how a small voltage change (from the phaseshift oscillator) can change the resistance of the "varistor".... OR????

 cheers from Sweden

björn
 
ganzonimx
Hey get your own solder
Posts: 446
(3/31/04 8:22 pm)
 Re: what's a varistor ?
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 what's a varistor?

I also din't know ...
 
gammelnalle
Junior tube assistant
Posts: 30
(3/31/04 9:07 pm)
 Re: what's a varistor ?
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 Thank you ganzonimx for the link, but actually; That much I knew.... but how can that be used for the thing the Magnatone uses it for... thats whats bugging me!!???
 

cheers from sweden
björn
 
 
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